30results about How to "Generate less waste" patented technology

A wristband is assembled from a flexible preferably vinyl carrier and a preferably laminated ID label, the carrier having a panel portion and a strap portion with a snap closure located in a toe extension at the end of the carrier adjacent the panel. The strap has a series of holes, one of which is captured within the snap closure to attach the wristband to the wearer's limb. The laminated ID label has a pair of opposing slots, one of which slips over the strap to abut the panel and the other of which is captured by the snap closure to attach the label to the carrier. The panel portion has a relieved edge formed along its opposing sides which increases the comfort of the wristband as it is worn.

The invention relates to the field of welding material manufacturing, in particular to a manufacturing method of novel solid welding wires. The method starting from wire rod machining sequentially includes: forging, annealing, continuously wire drawing, scraping, and ultrasonic wave cleaning to obtain the solid welding wires which are bright and fine-grain. The solid welding wires include various non-ferrous metal and non-ferrous metal alloy welding wires. The manufactured solid welding wires have fine and even equiaxed grains on the transverse end faces and the longitudinal end faces, product strength and plasticity are increased evidently compared with other manufacturing methods, and excellent mechanical property is achieved. In addition, the manufacturing method is simple in process, low in waste material, high in yield and the like.

The present invention discloses a preparation method for optical activity active 3-amino butanol and optical activity 3-amino butyric acid. The optical activity active 3-amino butanol preparation method comprises: in a solvent, under effects of a hydroboration reduction agent and a Lewis acid, carrying out a reduction reaction on a compound represented by a formlu 65 to produce a compound represented by a formlu 14. The optical activity active 3-amino butyric acid preparation method comprises: carrying out a hydrolysis reaction on a compound represented by a formlu 64 to produce a compound represented by a formlu 65. According to the present invention, the preparation method has characteristics of cheap and easily-available raw materials, simple operation, short process route, no hazard of raw materials, high yield, little waste production, environment protection, high raw material conversion rate, high product chemical purity and high product optical purity, and the industrialization is easily achieved. The formulas 64, 65 and 14 are defined in the instruction.

The invention provides an automatic shifting producing device for a silent bearing retainer. The device comprises a feeding assembly, a shifting assembly, a forming die, a shaping die and a punching die, wherein the feeding assembly comprises a feeding hydraulic cylinder, a position fixing plate and a pushing plate; the shifting assembly comprises a first transverse guide rod, a second transverse guide rod, a left longitudinal guide rod, a right longitudinal guide rod, a transverse returning spring and a longitudinal returning spring; the forming die comprises an upper forming die and a lower forming die; the shaping die comprises an upper shaping die and a lower shaping die; the punching die comprises an upper punching die and a lower punching die; the upper punching die comprises a punching propping plate, punching pins and a guide plate, wherein the punching pins are arranged as a circle; a plurality of guide holes through which the punching pins pass are formed in the guide plate; a circular clamping groove is formed in the bottom part of the guide plate; a circular supporting groove for storing the silent bearing retainer is formed in the top part of the lower punching die. The device is reasonable in structural design, enables automatic shifting of a workpiece in processing, is high in processing accuracy, produces few wastes, and is beneficial for production and application.

The invention discloses a preparation method for preparing an intermediate compound II of pregabalin. The preparation method of the intermediate compound II comprises the following steps of: (1) undergoing an SN2 substitution reaction on a compound VI and XCH2COOR2 to obtain a compound I; and (2) undergoing a Wittig-Hornor reaction on the compound I obtained in the step (1) and isobutylaldehyde, wherein R1 is alkoxyl with 1-6 carbon atoms or aryl with 6-10 carbon atoms; X is halogen; and R2 is alkyl with 1-6 carbon atoms. The invention further relates to a preparation method for preparing an intermediate compound V of pregabalin. The preparation method of the intermediate compound V comprises the following step of: undergoing an asymmetric hydrogenation reaction on the compound IV and hydrogen gas in a solvent under the action of [Rh((Sc,Rp)-Duanpos)(COD)]BF4, wherein M is H, alkyl with 1-6 carbon atoms or t-BuNH<3+>.

The invention belongs to the technical field of medicinal chemistry, and specifically relates to a multi-substituted naphthoquinone derivative and its preparation method and application. The structure of the derivative is shown in the general formula (I), wherein, R 1 selected from ethoxy, diphenylmethoxy, linalyl, D-menthol; R 2 selected from thiophene, phenyl, p-bromophenyl, p-methoxyphenyl, 2,4,6-trimethylphenyl; R 3 selected from hydrogen, nitro; R 4 Selected from hydrogen, fluorine, and bromine; the derivative has a novel structure and has a good antitumor effect, especially has a good inhibitory effect on colorectal adenocarcinoma cells, osteosarcoma cells and breast cancer cells. It has great application value and is expected to be prepared as an antitumor drug; at the same time, the preparation method of the polysubstituted naphthoquinone derivative has fewer reaction steps, simple and safe operation, low cost, less waste generation, high atom economy, and high selectivity. Sex, the advantage of high yield.

The invention discloses a method for removing a methyl blue dye in wastewater. According to the method, zinc oxide or a doped zinc oxide base material is utilized as an adsorbing agent to remove the methyl blue dye in the wastewater. The raw materials adopted by the method are low in cost and easy to obtain, the reaction is quick and efficient, and the method is simple to operate; and the absorption quantity and removal rate of the methyl blue dye in the wastewater are high, the absorption quantity can reach 4-50mmol / g, the removal rate can reach 70-100%, and the method is suitable for industrial large-scale application.

A method for the quantification of 227Ac in a 223Ra composition comprising passing the composition through a first solid phase extraction column A, wherein said column comprises a thorium specific resin, passing the eluate of column A through a second solid phase extraction column B, wherein said column comprises an actinium specific resin and recovering the 227Ac absorbed onto the resin in column B and determining the amount thereof.

Provided is a method for producing a compound using a biocatalyst. In the method for continuously producing a compound using a biocatalyst in one or a plurality of reaction tanks, the downstream reaction temperature is set higher than the upstream reaction temperature of the flow of the catalyst in a reaction tank or between reaction tanks.

The present invention belongs to the technical field of medicinal chemistry, and specifically relates to an indenone imine derivative and its preparation method and application. The structure of the indenone imine derivative is shown in the general formula (I), wherein the R 1 selected from hydrogen, fluorine, chlorine, bromine; R 2 Selected from hydrogen, fluorine, chlorine, trifluoromethyl, and methoxycarbonyl; the derivative has a novel structure and has good antitumor effects, especially for colorectal adenocarcinoma cells, osteosarcoma cells, and breast cancer cells Inhibition of anti-tumor effect has great application value, and it is expected to be prepared as anti-tumor drug, especially anti-colorectal cancer cell, osteosarcoma cell and breast cancer cell drug; meanwhile, the indenone imine The preparation method of the derivative has fewer reaction steps, simple and safe operation, low cost, less waste generation, and has the advantages of high atom economy and high yield.